What is (6+9i)-(-6-4i) ?

The solution to (6+9i)-(-6-4i) is 12+13i

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simplify (6+9i)-(-6-4i)

simplify

(6 + 9 i) - (- 6 - 4 i)

12 + 13 i

Solution steps

(6 + 9 i) - (- 6 - 4 i)

Group the real part and the imaginary part of the complex number

(a + bi) - (c + d i) = (a - c) + (b - d) i

= (6 - (- 6)) + (9 - (- 4)) i

Simplify

(6 - (- 6)) + (9 - (- 4)) i : 12 + 13 i

= 12 + 13 i

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